Portable power attachment for hand stocks and pipe dies



May-19, 1925.

'- s.-c. DOEHRING PORTABLE POWER ATTACHMENT FOR H'AND STOCKS AND RIPEIADIESJ Filed July 1. 1922 Patented May 19, 1925.

UNITED STATES v 1,538,096 PATENT omen.

STEPHEN CORNELIUS DOFiHRIN'G. 0F HOUSTON, 'TEXAS.

PORTABLE rownn ATTACHMENT FOR HAND STOCKS AND PIPE DIES.

Application filed July 1,

To aZZwhom it may concern.

Be it known that I, STEPHEN C.Dor.H n1NG,

citizen of the United States, residing at Houston, in the county ofHarris and State of Texas, have invented certain new and usefulImprovements in Portable Power Attachments for Hand Stocks and PipeDies;

and I do hereby declare the following to be- The invention consists ofan annular frame or housing within which is supported a ring gear, thegear being driven by suitable power mechanism supported on the housing,the die being carried in a stock which is connected to the gear in amanner "hereinafter specified. The annular frame is provided withhandles. to permit handling.

The various features of novelty and invention will appear from thedetailed description taken in connection with the accompanying sheet ofdrawing forming .part of this specification, and in which Figure 1 is -aplan view of the improved device; 4

Fig. 2 is a section on line 22 of Fig. 1, and

Fig. 3' is a fragmentary view on an en larged scale of certain'details.

,Referring to the drawings, 10 designates a'die stock or frame of anysuitable form, which is to'be power driven. ,Extending radially from theframe 10 is a plurality of conventional handles or spokes 12, thesebeing connected to the framelO in any suitable manner as by beingmounted in sockets 13. 14 is a ring gear having inwardly projectingsocketswithin' which the outer ends of the spokes 12 are secured, said'spokes being removably mounted in said sockets as by clamp plates 15.

The ring gear is supported in a housing 16 which is preferably made intwo parts 16 and 16, the two parts having radial lugs 17 through whichare passed suitable. se-v curing members 18. The housing is open at itsinner periphery and has angular flanges or ledges 19 which are adaptedto enter grooves 20 in the side faces of the gear '14, in a manner tosupport the gear and 1922. Serial No. 572,244.

Mounted on the housing is a shelf or support 21' on which is mounted amotor 22, and a worm 23 .is supported in suitable bearings 24 on thehousing. 25 is the connecting shaft between the motor and worm and 26 isthe cover extending over the worm. Extending from the housing are handlemembers 27 by which the device is' handled. A hook 28 pivotallyconnected to the housing as at 29 allowsthe device to be suspended ifdesirable.

When it is desired to thread a pipe by the improved power attachment,the die stock is slipped on pipe. The device c'an'be suspended from thehook 28 and held by the made on the gear ring for four or more such"spoke handles.

I have shown the gear 14 as driven by a worm, but this is merely forillustrative purposes. It is contemplated that if found desirable, thegearmay be driven by a'bevel pinion instead of a worm.

It will now be seen that the housing and gear 14 are'sov coordinatedthat the gear is supported in a simple and eflicient manner, and at thesame time the ledges 19 and 20 on the housing prevent the entrance ofdirt and chips intothe housing-where it would cause damage to the movingparts. The invention is relatively simple but is of great usefulness toplumbers and others having occasion to use large pipe dies.

What I claim is:

1. The combination of a rin gear having anannular groovein each si eface and a plurality of cutouts formed'inw'ardly of the said grooves,clamping blocks removably se-- cured over said cutout to secureradiallyextending members, a two-part housing inclosing said ringoutwardly of said clamping 2. In combination, a ring gear, means fordriving said ring gear including a gear on the inner periphery of saidgear to meshing with the ring gear and extending which spoke-likemembers may be secured, through the housing, said housinghaving mahousing within which said gear is mountradial arms by means of which thesame 5 ed, said gear having inwardly directed opmay be supported.

posed ledges Which'are received Within an- In testimony whereof I afiixmy signature.

nular grooves in the sides of the gear, means STEPHEN CORNELIUSDOEHRING-

